Pulmonary Hypertension Findings Detected by F-18 FDG PET Scan

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A 72-year-old female patient had severe pulmonary hypertension on transthoracic echocardiography with a pulmonary arterial pressure of 125 mm Hg, moderate tricuspid regurgitation, and a moderately dilated, mildly hypokinetic right ventricle (RV). A CT scan, performed to assess the etiology of the pulmonary hypertension, revealed a right middle lobe lung nodule and enlarged mediastinal lymph nodes. A subsequent F-18 FDG PET scan demonstrated the right middle lobe lung nodule and the mediastinal adenopathy to be FDG-avid, but a striking incidental finding on this study was intense RV FDG uptake, secondary to RV hypertrophy and strain.

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